Apparatus for separating floating matter from effluents.



I R. SCHILLING; APPARATUS FOR SEPARA'IING FLOATING MATTER FROMBFFLUENTS.

I APPILIUATION FILED DEOJO 1,057,174.

Patented Ma1y25, 1913.

RUDOLF SCHILLING, OF SCHfiNEBERG, NEAR. BERLIN, GERMANY.

arranarus son SEPARATING swarms MATTER anon nrnnunnrs.

Application filed December 10, 1809. Serial No. 532,345.

v To all whom it may concern:

Be it known that I, RonoLF Sornnnmma subject of-the German Emperor, andresi.ding at Schifineberg, near Berlin, Germany, have invented certainnew and useful Improvements in Apparatus for Separating Floating Matterfrom Efilpents, of which the following is a specification?" My inventionrelates to devices for separating suspended matter from Waste water orefl iuent p In order to permit suspended matter in waste Waters to beseparated therefrom in the form of a floating layer, the currentvelocity of the waste waters has been slackened by using devices w'bywhichthe waste waters were supplied into special tanks. from which thewater Wasconducted away either laterally or above the same. It has alsobeen proposed to attain the same end by using clarifying tanks providedwith partitions. In these'systems, however, it was not possible to avoidseparating the heavy substances beneath the floating layer anddepositing them in the same tank. By thus simultaneously separating outthe suspended matterand the heavy substances, there resulted on the onehand the important disadvantage that products of fermentation might riseup from the heavy substances and thus mix with and pollute the floatinglayer, whereas the removal of the sediment at the bottom is much toocostly in comparison with the profits resulting from the utilization ofthe floating matter, particularly in cases when the plant is speciallyfor admitting of the floating matter being utilized, for example whencollecting fatty substances. In plants of the kind described thesediment was removed either by providing special slime buckets, whichwere removed and emptied from time to time, or by providing specialstripping devices, which removed the deposits into an adjacent tank;when using clarifying tanks, in order to facilitate the work these tankswere intermittently cut oil for the purpose of removing the sediment,slime buckets being also employed from which the sediment was removed bysuction'. As compared with these devices known heretofore in which. afloat- Specification of Letters Patent.

Patented l t tar. as, 1913.

ing layer was produced and other matter settled at the bottom and had tobe removed by special means, in the apparatus accordmg to my inventiononly the floating matter is separated out, whereas the heavy matter orsediment is removed directly by the Water as it flows away. To thisend,I produce a floating layer by slackening the current velocity of thevwater in known manner, Whereas for the precipitated substances orsediment I obtain such rapid currents that these heavy substances can nolonger be do posited on the bottom but are exposed to the action ofthese rapid currents. I obtain the necessary slackening of the currentvelocity of the Water so as to admit of a floating layer being producedby conducting the liquid in .known manner into a tank, the cross-sectionof which is considerably larger than that of the water supply pipe. Thecurrent of Water can be still further checked by inserting special wallssituated concentrically to the inlet of the water. These -walls'at thesame time 'form adhesion surfaces, on which the floating matter, moreparticularly the fat, can accumulate and rise to the top. I obtainthecurrentfor conducting away the heavy matter together with the WasteWaters from which the floating matter has been separated by transformingthe static pressure of the still liquid carrying the floating layer intocurrent energy by considerably constricting the cross-section.

I will now describe my invention with reference to the accompanyingdrawing showing one illustrative embodin'ient thereof.

In said drawingziFigure 1 shows a longitudinal section through myapparatus, and Fig. 2 is a plan view of the same. v

ln the illustrative embodiment the floating matter is separated in theupper part of a tank a, the bottom portion of which is funnel-shaped.The waste waters are introduced in the direction of the arrows into tanka through the curved conduit 6 and are discharged into the center of thetank,

The upper portion of tank a is cylindrical and is provided with a numberof concentric walls j. 'The lengths of these walls increase from thecenter to the periphery of the tank, so that the bottom edge of eachouter wall is somewhat lower than that of the adjacent inner wall.Furthermore the lower ends of the walls f are preferably provided withhorizontal inwardly projecting flanges Z, for the purpose of keepingthe'fatty particles and the like collecting on the walls safely beyondthe action of the current below the edges of the wall. The innermostcircular wall f does not act as collecting chamber for the suspendedmatter because the current velocity in the same is too high; thisinnermost cylinder f may be perforated, if desired, as show Forconducting away the waste waters and the heavy matter, I provide adouble cone 'm, the lower part of which forms with the bottom part oftank (1 a constricted channel n, by means of which thenecessaryreduction of cross-section for the purpose of producincg a strongdischarge current is obtaine 1 d1 I t Twos 0 ing upwar yrojec in pipesi, k are fitte d to the outlet pipe h 0% tank (1. Pipe It serves forconducting away the waste waters carrying along the heavy matter withthem; the upper end of this pipe should not beat a higher level than thesupply channel b, The other pipe i merely serves for cleaning purposessoas to be able to remove any stoppages in the pipe is by means of acleaning device. The upper end of the cleaning (piped must be situatedhigher than pipe I). wing to the arrangement of pipe 5 no special valveor closure member is necessary beneath pipe h and owing to myconstruction no special shaft is required for gaining access to suchclosure member.

I claim 1. In apparatus for separating floating matter from eilluents,the combination of a cylindrical tank having a downwardly-directed,conical lower part having an outlet, a central, cylindrical, perforatedwall in the upper portion of said tank, a plurality of concentric wallshaving inwardly-directed flanges at the bottom ends thereof arrangedaround said central wall, each outer flanged wall being long than thenext inner wall, a supply pipe or ening upwardly into said central wall,a double conical, constricting member arranged between the inner end of"said pipe and said outlet, a discharge pipe connected with said outlet,and a ipe connected with the discharge pipe an opening above the levelof said supply pipe.

5.. an a paratus for separating floating mat.cr from eiiluents, thecombination of a tanl; having a fuimehshaped lower part, with acontracted outlet opening at the bottorr, of said constricted part, anupwardly directed inlet opening in the upper part of the tank above thecontracted lower part thereof, a deflecting and constricting memberarranged in the tank between the inlet and outlet whereby currentvelocity of the .rent velocity of the eflluent is eflluent is diminishedabove said member and increased around and below said mem-' ber, and aplurality of concentric walls having inwardly directed flanges at theirlower ends arranged in the upper part of the tank around the inletopening.

3. Apparatus for separating floating matter om 'efiiuents, comprising areceptacle having an upper part of large cross section and a contractedlower part, with an open and unrestricted outlet at the terminal of thecontracted portion, and a conduit leadin from said outlet to a pointnear the top 0 the apparatus to maintain the water level in the aparatus, and an inlet above the contracmd portion whereby the currentvelocity of the efiluent dischar ed into the receptacle is so diminishedin the upper part thereof that a floating top layer can form in thefluid therein while the etlluent is continuously discharged withsuflicient velocity at the outlet to prevent heavy matters settling inthe receptacle.

4. Apparatus for separatingfloating matterifrom eflluents, comprising atank ha a conical lower part, with an unrestric outlet at its bottom,and a conduit lead' from said outlet to a point near the to o theapparatus to maintain the water oval in the apparatus, and an inlet inthe upper part of the tank; with a deflecting and cow strictin memberarran ed in the tank between t e inlet and out et whereb thecuriminished above said member and increased below said member theoutflow being continuous thus preventing heavy matter contained in saideflluent from settling in the tank.

5. Apparatus for separating floati matter from eflluents, comprising atank iaving a contracted lower part, with an outlet at its bottom, and aipe communicating with said opening and leading to a point above thelower part to maintain the water level in the apparatus; an'upwardlydirected suppl pipe entering the u perpart of the tan: above thecontracted ower part'thereof, and a plurality of concentric walls arraned in the upper portion of the tank aroun said inlet whereby thevelocity of the eflluent is diminished in the upper part of the tank butincreased in the constricted part thereof thus permitting a continuousoutflow of fluid and preventing heavy matters from settling in the tank.I

6. In an apparatus for separating floating matter from eflluents, thecombination of a tank having a conical lower part with an unrestrictedopening at its bottom, and a pipe communicating with said opening andleading to a point above the lower part to maintain the water level inthe apparatus; an inlet pipe in the upper part of the tank above theconical lower part thereof, a plurality of concentric walls arranged inthe ugper part 0f the tank around the inlet heavy matters contained insaid eflluent pipe, a defiectin and eonstricting member from settling inthe tank. 10 arranged inihe 0Wer part of the tank be In testimohywhereof, I efix my signature tween the inlet and outlet, whereby currentin the presence of two witnesses. velecity of the efflueut is diminishedabove RUDOLF SCHILLING. said member and increased around and beNVitnesses: 10W said member, thus permitting a con- HENRY HASPER tinueusoutflow of fluid end prevehting WOLDEMAR HAUPT.

